问题
选择题
Most of the evidence was destroyed in the fire. ______, it would be almost impossible to prove
Jim guilty. [ ]
A. Anyhow
B. However
C. Besides
D. Thus
答案
答案：D
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Most of the evidence was destroyed in the fire. ______, it would be almost impossible to prove
Jim guilty. [ ]
A. Anyhow
B. However
C. Besides
D. Thus
答案：D
该原子最外电子层上有____个电子，该原子所形成离子的符号是____。